Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung len doan snippets" » "dung nen doan snippets", "dung le doan snippets", "dung luan doan snippets", "dung lien doanh snippets", "dung long doan snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung len doan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung len doan snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung len doan snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung len doan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.